Run gdb.base/sizeof.exp with board having gdb,noinferiorio

In my remote cross testing (x86_64 host and aarch64 target), the test
gdb.base/sizeof.exp is skipped because gdb,noinferiorio is defined in
my gdbserver board file.  Tests are skipped because the test checks
the expected value from the program's output, but I don't see why must
do it this way.  With my patch applied, we can save the result in variable
in the program, and check the variable then.  Then, the test doesn't rely
on inferiorio.

gdb/testsuite:

2015-12-03  Yao Qi  <yao.qi@linaro.org>

	* gdb.base/sizeof.c: Don't include stdio.h and
	../lib/unbuffer_output.c.
	(main): New variable 'size' and 'value'.  Remove printf and
	gdb_unbuffer_output.  Assign return value to size and value.
	* gdb.base/sizeof.exp: Remove the checking to gdb,noinferiorio
	at the beginning.
	(check_sizeof): Check the result by printing variable 'size'.
	(check_valueof): Check the result by printing variable 'value'.

3 files changed, 31 insertions, 39 deletions

diff --git a/gdb/testsuite/ChangeLog b/gdb/testsuite/ChangeLog
index 7321208..97df17a 100644
--- a/gdb/testsuite/ChangeLog
+++ b/gdb/testsuite/ChangeLog
@@ -1,3 +1,14 @@
+2015-12-03  Yao Qi  <yao.qi@linaro.org>
+
+	* gdb.base/sizeof.c: Don't include stdio.h and
+	../lib/unbuffer_output.c.
+	(main): New variable 'size' and 'value'.  Remove printf and
+	gdb_unbuffer_output.  Assign return value to size and value.
+	* gdb.base/sizeof.exp: Remove the checking to gdb,noinferiorio
+	at the beginning.
+	(check_sizeof): Check the result by printing variable 'size'.
+	(check_valueof): Check the result by printing variable 'value'.
+
 2015-12-01  Yao Qi  <yao.qi@linaro.org>
 
 	* gdb.base/disp-step-syscall.exp: Define syscall instruction
diff --git a/gdb/testsuite/gdb.base/sizeof.c b/gdb/testsuite/gdb.base/sizeof.c
index eb21f22..fde5213 100644
--- a/gdb/testsuite/gdb.base/sizeof.c
+++ b/gdb/testsuite/gdb.base/sizeof.c
@@ -1,7 +1,3 @@
-#include <stdio.h>
-
-#include "../lib/unbuffer_output.c"
-
 typedef char padding[16];
 
 struct {
@@ -100,28 +96,26 @@ fill_structs (void)
 int
 main ()
 {
-  gdb_unbuffer_output ();
+  int size, value;
 
   fill_structs ();
 
-  printf ("sizeof (char) == %d\n", (int) sizeof (char));
-  printf ("sizeof (short) == %d\n", (int) sizeof (short));
-  printf ("sizeof (int) == %d\n", (int) sizeof (int));
-  printf ("sizeof (long) == %d\n", (int) sizeof (long));
-  printf ("sizeof (long long) == %d\n", (int) sizeof (long long));
-
-  printf ("sizeof (void *) == %d\n", (int) sizeof (void*));
-  printf ("sizeof (void (*)(void)) == %d\n", (int) sizeof (void (*)(void)));
-
-  printf ("sizeof (float) == %d\n", (int) sizeof (float));
-  printf ("sizeof (double) == %d\n", (int) sizeof (double));
-  printf ("sizeof (long double) == %d\n", (int) sizeof (long double));
+  size = (int) sizeof (char);
+  size = (int) sizeof (short);
+  size = (int) sizeof (int);
+  size = (int) sizeof (long);
+  size = (int) sizeof (long long);
+  size = (int) sizeof (void*);
+  size = (int) sizeof (void (*)(void));
+  size = (int) sizeof (float);
+  size = (int) sizeof (double);
+  size = (int) sizeof (long double);
 
   /* Signed char?  */
-  printf ("valueof ('\\377') == %d\n", '\377');
-  printf ("valueof ((int) (char) -1) == %d\n", (int) (char) -1);
-  printf ("valueof ((int) (signed char) -1) == %d\n", (int) (signed char) -1);
-  printf ("valueof ((int) (unsigned char) -1) == %d\n", (int) (unsigned char) -1);
+  value = '\377';
+  value = (int) (char) -1;
+  value = (int) (signed char) -1;
+  value = (int) (unsigned char) -1;
 
   return 0;
 }
diff --git a/gdb/testsuite/gdb.base/sizeof.exp b/gdb/testsuite/gdb.base/sizeof.exp
index ce6b7ed..550f80d 100644
--- a/gdb/testsuite/gdb.base/sizeof.exp
+++ b/gdb/testsuite/gdb.base/sizeof.exp
@@ -15,11 +15,6 @@
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
-if [target_info exists gdb,noinferiorio] {
-    verbose "Skipping sizeof.exp because of no fileio capabilities."
-    continue
-}
-
 #
 # test running programs
 #
@@ -48,7 +43,7 @@ if ![runto_main] then {
 # Query GDB for the size of various types
 #
 
-gdb_test "next 2"
+gdb_test "next"
 
 set sizeof_char [get_sizeof "char" 1]
 set sizeof_short [get_sizeof "short" 2]
@@ -68,12 +63,8 @@ set sizeof_long_double [get_sizeof "long double" 8]
 #
 
 proc check_sizeof { type size } {
-    global gdb_prompt
-
-    set pat [string_to_regexp "sizeof (${type}) == ${size}\r\n"]
-    gdb_test_stdio "next" "${pat}" \
-	"\[0-9\].*" \
-	"check sizeof \"$type\""
+    gdb_test "next" "" ""
+    gdb_test "p size" " = ${size}" "check sizeof \"$type\""
 }
 
 check_sizeof "char" ${sizeof_char}
@@ -90,12 +81,8 @@ check_sizeof "double" ${sizeof_double}
 check_sizeof "long double" ${sizeof_long_double}
 
 proc check_valueof { exp val } {
-    global gdb_prompt
-
-    set pat [string_to_regexp "valueof (${exp}) == ${val}\r\n"]
-    gdb_test_stdio "next" "${pat}" \
-	"\[0-9\].*" \
-	"check valueof \"$exp\""
+    gdb_test "next" "" ""
+    gdb_test "p value" " = ${val}" "check valueof \"$exp\""
 }
 
 # Check that GDB and the target agree over the sign of a character.